Question about Honda FLSTSCI Softail Springer Classic Motorcycles

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Honda 900F 1980. On start up it only fires on 2 cylinders. As I pull away it starts coming right, but when I open the throttle it starts missin again until I decelerate slightly.

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CARB problems need to rebuild carbs get new carb kits get the gas tank cleaned MOPAR KENNY

Posted on May 22, 2011

  • trevorwhi298 May 22, 2011

    All been done. I don't think it's fuel starvation. Could it be ignition coil or faulty bougi cords?

  • Kenneth Maas May 22, 2011

    could be bad coil or bad plug wires MOPAR KENNY

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1980 CX 500. Why doesn't left cylinder fire until high rpm?


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Just a hunch. Clearly there is a fuel issue on one of the cylinders. Although you cleaned the carb, please confirm that the intake valve is clean and/or reed valves are working properly. It is possible that the 2nd cylinder is only firing occasionally even at the higher RPM but it's less noticeable because of the engine's inertia at that speed makes it "seem" to be running smoother. The clue lies in the fact that the engine runs smoothly at idle when the choke is applied and starts to miss when choke is open ... this is indicative of fuel starvation. And yes, on a 2 cycle, a lack of fuel means a lack of lubrication.

Out of curiosity, take both spark plugs out and crank the engine. Do this outside away from an open flame. Compare the amount of misted fuel that comes out of each cylinder head with the choke closed and then again with the choke open. If it isn't even then the cylinder that is blowing less fuel is being starved. This should identify the problem cylinder and help to narrow down the elements left to troubleshoot and replace/repair/clean. Good luck and hope this helps

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What colour wire goes were on Honda cb 900f ignition coil 1980 model


There are two ignition coils.1) With Black/White and Blue wires that goes to 1 & 4 cylinders2) With Black/White and Yellow wires that goes to 2& 3 cylinders

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No spark to rear cylinders runs good and then runs on one cylinder 1986 honda shadow 1100


try switching the position of the two coils, the plug wires will unscrew off of the coils and that way you dont have to pull the spark plug wires too,(be sure and change the 2 wire couplers too) if your front cylinder stops firing you know its the coil, if the back cylinder still doesn't fire then your coil is good and you either have a bad #2 spark unit or a bad crank pulse generator.

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Make sure the fuel valve is on. Generally that means pointing down inless there is a diagram on it.

Turn the switch on.

Pull the choke on the carbuerator on full. There will be a picture of a butterfly valve set it so that it is closed. Pull the cord till the engine fires. let it sputter for a second, then open the choke. If the engine dies right away, do all of the above again but once it fires, only open the choke half way. once it warms up a bit open the choke completely.

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Hi and welcome to FixYa,

Bypassing the kill switch means removing the connection of the black / white wire either at the emergency stop switch (kill/run), ignition switch or preferably at the CDI connector.

Additionally, you can try:
  • start with the side stand up;
  • check/wiggle the 6 wires coming from the stator going to the CDI.

Would appreciate a postback on results / updates.

Good luck and thank you for using FixYa.

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1 Answer

When I downshift to 3rd gear to pass a car, wind the gear out to about 7000 rpms, shift to 4th, and settle back to highway speed in 5th gear, it starts running on 3 cylinders. The only way it goes away is...


This sounds more like the carbs than the coil pack, but is unusual that 3 would go dead all at the same time unless it was one side of the ignition. The only time I have had 3 go out was when i had to fix the ignition. I have had to rebuild the carb assy out because of junk in the carbs, but it didn't affect 3 at a time.

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3 Answers

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Hi,
The # 1 cyl is on the left side as you are sitting on the bike. Firing order does not really apply to these motors as the coils fire twice per cyl. The left coil will fire 1 & 4 the right coil will fire 2 & 3. I usually hook them up as follows: Left outer to #1, Left inner to #4, Right inner to #2, and Right outer to #3
Here is a good site on XJ's
http://www.geocities.com/MotorCity/Speedway/7795/xjfaqbig.html
I hope this helps

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1 Answer

My car will not start


Hmmm.. did ya get the rotor button in right? Also oil couldve fouled the module.. Not to mention Honda had a recall on distributors around 1996.. check into the recall

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